Countless threats exist deep in the jungle. But it's not just poisonous, candy-colored frogs or fish with rows of razor teeth that trouble intrepid explorers—the jungle is home to a host of wild, unexplained happenings and folklore that all carry real, bone-chilling consequences.

La Isla De Las Muñecas

Known as la Isla De Las Muñecas to locals, Mexico's Island of the Dolls is a haunting landmark that both attracts and terrifies all who come across it. Located in a remote and labyrinthine canal system off Lake Xochimilco, the island serves as decrepit tribute to the soul of a little girl who supposedly drowned nearby.

However, it seems as if Don Julian's exorcism efforts we're all for naught. In 2001, 50 years after he left his wife and child to live in the wild and build his strange alter, Don Julian was found floating at the very spot the girl was said to have drowned. Now when travelers dare to approach the island, they bring presents for the child in hopes of appeasing the child and enjoying a safe passage.